[OpenSIPS-Users] Music on hold, sdp 0.0.0.0.

[Răzvan Crainea]

Hi, Miha!

Indeed, this is a classical late-negociation scenario, when the media 
session is established by the 200OK and the ACK.
However, I am not sure what you are trying to achieve. So you are saying 
that B puts A on hold and then transfers the call to C. But what happens 
to the B leg? I don't really understand why A should still be able to 
talk to B.
Also, can A and C hear each other? I am not sure what is the desired 
behavior. Can you please give a little more details about the call? 
Probably a SIP trace will be helpful.

Best regards,

Razvan Crainea
OpenSIPS Core Developer
http://www.opensips-solutions.com

On 06/20/2013 08:50 AM, Miha wrote:
> Dne 6/20/2013 8:32 AM, piše Miha:
>> Hi,
>>
>> I need one info regarding puting user on hold.
>>
>> A calls B, B puts A on hold and do 2-transfer to C. After C answers it
>> puts A and C together.
>>
>> A is on our side, using opensips and FS for media gw, B and C on other
>> side using netcetrex softswitch.
>>
>> A sends invite with SDP to B, B sends OK, and send reinvite with SDP
>> c=0.0.0.0. which is ok, A sends ok and music is heard by A, after B
>> trasfer call to C and C pickup call, A gets invite buth with no SDP.
>> is this ok? I guess it should sends invite with sdp which has IP for
>> sending RTP. This results that A and B can not hear each other.
>>
>> Other side is saying that with other voip providers this works ok.
>>
>> thanks!
>>
>> Miha
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.opensips.org
>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>
> I also noticed one thing. After they send invite without SDP, we sends
> SDP 200 ok and they send back ACK SDP in which they send c=IP. According
> to RFC this is right way.
> What I am missing here.
>
> thanks!
>
> miha
>
> _______________________________________________
> Users mailing list
> Users at lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users